Water-heater.



Patented I190, 30,1902. J. F. YOHO. WATER HEATER. (Application filed Feb. 21, 1902.)

V WITNESSES IN VE N T 0/? J01 F5620 A FORMER ATENT FFIcE.

JOHN F. YOI-IO, OF SEATTLE, WASHINGTON.

WATER-HEATER.

SPECIFICATION forming part of Letters Patent Iva 717,492, dated December 30, 1902- Application filed February 21 1902. Serial No. 95,080. (No model.)

To aZZ whom it may concern:

Be it known that I, JOHN F. YOHO, acitizen of the United States, residing at Seattle, in

the county of King and State of Washington,

have invented certain new and useful Im-,

provenients in Water-Heaters, of which the following is a specificatiom'reference being had therein to the accompanying drawings.

This invention relates to water-heaters, and

particularly to that class adapted to heating water for bath purposes.

It has for its object the provision of a device whereby a large body of water is raised to a relatively high temperature with but a small consumption of fuel.

To these ends the invention consists, first, in constructing the heater of an internal inverted-funnel-shaped combustion -chamber, surrounded by a concentric water-chamber, whereby the water is advantageouslydisposed for quick heating; secondly, by the provision of atelescopic self-adj ustable draft-pipe for admitting air in proximity to the combustibles, and, lastly, in details of construction and combination of the various parts, all of which I will now proceed to describe.

In the accompanying drawings, Figure 1 is a vertical central section of a heater embodying my improvements, and Fig. 2 is a plan view of the same.

In said drawings letters a and I) represent, respectively, the inner and outer shells of the water-heater proper. The outer shell I) is cylindrical and theinner one a tapers upwardly from a dished bottom a, forming a frustumshaped fire-box therein. The two aforesaid sections are secured to each other through their bottoms by rivets c, and distance-pieces or washers d are used to prevent their surfaces coming into contact, and thus provide a water-jacket therebetween having asloping top, from which the steam generated thereat freely escapes in radial directions to mingle with the concentric column of water between the two aforesaid shells. A cover 6 extends across the outer shell, leaving, preferably, an opening t between the top margin of the inner shell and the said cover. Above the fire-box in the said cover is an opening g for the insertion of adraft-fiue f, and another opening h, having a flange h thereabout in which is socketed the smoke-pipe z',connecting the firebox a directly to a chimney, or, as shown in the drawings, to a belt-casing w,concentric of the outer shell b, and from thence the smoke is exhaustedthrough pipe 1', preferably positioned adjacent to the bottom of the said casing. The said draft-flue is in two parts, the upper one, f, being funnel-shapedthat is, it tapers from the top toward the bottomthe top diameter being greater than the diameter of the said cover-opening g, thus preventing the same dropping entirely therethrough, my intention being to have its lower end extend down within the fire-box about half the depth of the latter. The other flue-piece f is of less diameter than the opening at the smaller end of piecef; but in order to prevent its dropping entirely from the upper part I provide a flange or corrugation j in proximity to its top end. The length of the piece f is such that it will reach, when in its lowest or extended position, from a short distance within the main portion f to near the bottom of the fire-box and is intended to rest upon the fuel and lower therewith as it is consumed, thereby supplying a draft in proximity to the flame, as well as through the space 1" between the parts of the flue.

. 7c is the water-inlet pipe adjacent to the bottom of the water-compartment, andZ is an aperture positioned close to the top for the egress of the water from the surface and is preferably made wide and of relatively small depthsay three inches by one-quarter inch, respectively. The water flowing from the said aperture passes through a spout m, to which is clamped a tube 17., preferably flexible, to convey the Water therefrom.

The operation of the device is as follows: The draft-flue f and its extension f are removed, by means of a bail s, for putting the combustible materials in the fire-box and igniting the same. The said fines are then replaced, and a damper-platep across the mouth of the flue regulates the draft. The extension-piece f of the flue meanwhile rests upon and follows the fuel down as it is consumed, admitting air locally to the fire and also through the annular space '2" between the interfitting parts of the draftflue, which insures a proper supply of air for consuming gases which may have been driven off from the fuel, thus preventing the escape of the same unconsumed or those explosions common to air-tight furnaces having but a bottom draft. The water having previously been admitted to the running-over level or the height of openingZ is acted upon by the heat conducted through the inner shell and which by its tapering shape readily raises the temperature of the same to a high degree, when the water is freely admitted and is heated as it passes through the device. The tapering of the inner shell is advantageous for quick and economical heating, as the steam generated thereon instead of following and enveloping the shell with a non-conducting film thereof, as it would were it cylindrical, escapes vertically to be absorbed by the water through which it passes.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a waterheater, the combination of a cylindrical outer shellprovided with bottom and top ends, said shell being provided with inlet and outlet openings, a frustum-shaped inner shell open at the top and havingadished bottom, said dished bottom being secured to the said bottom end of the outer shell, said top end of the outer shell having draft and smoke flue apertures, a two-part draft-flue extending through said draft-aperture downwardly into the inner shell the upper of said parts being funnel-shaped and the lower one loosely fitted therein, substantially as and for the purposes set forth.

2. The improved water-heater comprising a cylindrical outer shell provided with bottom and top ends, said shell being provided with inlet and outlet openings, a frustumshaped inner shell having a dished bottom but open at the .top, said top end of the outer shell having draft and smoke flue apertures, a twopart draft-flue extending through said draftaperture downwardly into the inner shell, a belt-casing around the outer shell and provided with smoke inlet and outlet openings, communicative connection between the said smoke-aperture of the said shell-top and the inlet-opening of the belt-casing, substantially as and for the purposes described.

3. In a water-heater, the combination with an outer cylindrical shell having top and bottom ends, said shell being provided with water inlet and outlet openings, said top end of shell having fuel-supply and smoke-flue openings, of an internal fire-box formed of a frustum-shaped shell having a dished bottom, said dished bottom being secured to the said bottom end of the outer shell with a space for water therebetween, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN F. YOHO.

Witnesses:

PIERRE BARNES, JOHN N. PERKINS. 

